St Charles Weather Forecast

    • 55
    • 72

    Chance Rain Showers

    • 53
    • 70

    Chance Thunderstorms

    • 55
    • 74

    Chance Rain Showers

    • 58
    • 76

    Slight Chance Thunderstorms

    • 56
    • 78

    Slight Chance Thunderstorms

    • 54
    • 70

    Mostly Sunny

    • 52
    • 72

    Mostly Sunny

Today 18 Sep Cuming

Mostly cloudy with a slight chance of Showers and Thunderstorms. Near steady temperature in the lower 70s. South Winds around 10 Mph. Chance of rain 20 percent.

Tonight 18 Sep Cuming

Mostly cloudy. A slight chance of Showers and Thunderstorms late this evening. Lows in the mid 50s. West Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

St Charles Temperature Statistics

September Temperature

Fremont Municipal Airport (26.1 miles)

  • Lowest 6 September, 2025

    42.8 °F

  • Average September

    68.8 °F

  • Highest 13 September, 2025

    94.6 °F

Climate (2020–Present)

Fremont Municipal Airport (26.1 miles)

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  • Average Low 2020–2025

    42.2 °F

  • Average 2020–2025

    53.3 °F

  • Average High 2020–2025

    64.4 °F
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